Firefox Reader View Toolbar Inherit Background Color

/*======= Firefox Reader View Toolbar Inherit Background. =======*/

/*======= Controls toolbar =======*/

.toolbar {
  font-family: Helvetica, Arial, sans-serif;
  position: fixed;
  height: 100%;
  top: 0;
  left: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  background-color: #333333 !important;
  -moz-user-select: none;
  border-right: 1px solid #333333 !important;
  z-index: 1;
  /*visibility: hidden !important;*/
}

.button {
  display: block;
  background-size: 24px 24px;
  background-repeat: no-repeat;
  color: #333;
  background-color: #333333 !important;
  height: 40px;
  padding: 0;
}

.toolbar .button {
  width: 40px;
  background-position: center;
  margin-right: -1px;
  border-top: 0;
  border-left: 0;
  border-right: 1px solid #333333 !important;
  border-bottom: 1px solid #333333 !important;
}

/*======= Popup =======*/

.dropdown-popup {
  min-width: 300px;
  text-align: start;
  position: absolute;
  left: 48px; /* offset to account for toolbar width */
  z-index: 1000;
  background-color: #2B2B2B !important;
  visibility: hidden;
  border-radius: 4px;
  border: 1px solid #b5b5b5;
  border-bottom-width: 0;
  box-shadow: 0 1px 3px #c1c1c1;
}

/*======= Toolbar icons =======*/

.close-button {
  background-image: url("chrome://global/skin/reader/RM-Close-24x24.svg");
  -moz-context-properties: fill;
  fill: #808080;
  height: 68px;
  background-position: center 8px;
  /* visibility: hidden !important; */
}

.style-button {
  background-image: url("chrome://global/skin/reader/RM-Type-Controls-24x24.svg");
  /* visibility: hidden !important; */
}